x86-64: Add vector exp10/exp10f to libmvec microbenchmark

Add vector exp10/exp10f and input files to libmvec microbenchmark.

libmvec-exp10-inputs:
  90% Normal random distribution
  range: (-307.0, 308.0)
  mean: 0.0
  sigma: 16.0
  10% uniform random distribution in range (-250.0, 250.0)

libmvec-exp10f-inputs:
  90% Normal random distribution
  range: (-37.0f, 38.0f)
  mean: 0.0f
  sigma: 8.0f
  10% uniform random distribution in range (-25.0f, 25.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

sysdeps/x86_64/fpu/Makeconfig

@@ -57,6 +57,7 @@ libmvec-bench-funcs = \
   atan \
   cos \
   exp \
+  exp10 \
   exp2 \
   hypot \
   log \